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International Astronomical Center

ICOP

Visibility of Rabee' Thani Crescent
(1422 AH)

Last Updated 31 July 2001

In this page:-

When to Observe ?

The geocentric new Moon will occur on Thursday 21 June 2001, at 11:58 UT. On this day, the crescent won't be seen from any land, while on the next day (22 June), the program Moon Calculator by Dr. Monzur Ahmed -according to Yallop criterion- showed that Inshalla the crescent should be seen by naked eyes from nearly everywhere. Optical aid should be used from some north east and south east parts of the world. ACCORDING TO THE ACTUAL SIGHTING OF THE CRESCENT, THE START OF RABEE' THANI SHOULD BE ON Saturday 23 June 2001. Kindly click on the below icon to see the visibility parabola as plotted by the program Moon Calculator

Results of seeing the crescent, and the first day of the month in different countries will be added here Inshalla as we receive the reports from ICOP's members. If you wish to be a member in ICOP, or to know more about it, kindly click here.

Results of Observation

So far, the earliest sighting of the crescent was on Friday 22 June from Iran The crescent was also seen on this day from Saudi, Jordan, Algeria, Morocco, Nigeria, Germany and USA.

Friday 22 June

  • Malaysia: ICOP member, Mr. Kassim Bahali said: "I tried to see the hilal but the western sky was cloudy. The hilal was not seen. First of Rabae' thani begins on saturday 23 June 2001."

  • Brunei: ICOP member, Mr. Mahadi Mohamad Tahir said: "We have failed to sight the crescent for two days ie on 22/6/2001 and 23/6/2001. It was cloudy and rain respectively."

  • Iran:

    1. ICOP member, Mr. Saeed Janghorban mentioned that he saw the crescent by naked eyes.

    2. ICOP member, Mr. AliReza Mehrani mentioned that he saw the crescent by naked eyes.

    3. ICOP member, Mr. Asadollah Khoddam Mohammadi mentioned that it was cloudy.

    4. ICOP member, Mr. Amir Hasanzadeh mentioned that he saw the crescent by naked eyes.

    5. ICOP member, Mr. Hamid Rahkooi mentioned that he saw the crescent by naked eyes.

  • Saudi: ICOP member, Mr. Saleh Al-Saab mentioned that he saw the crescent by naked eyes.

  • Jordan: JAS has organized a special observing night for the crescent. Several Jordanian ICOP members went to the western part of Amman. The crescent was firstly seen by binoculars one minute after sunset, later on it was easily visible by naked eyes. The observers were: Hani Dalee', Sana'a Abdo, Basma Dyab, Moh'd Odeh, Tarik Al-Bishawi, Firas Khames, Bassam Abu-Naba'a, Tarik An-Naser, and Ghassan. Other observers from other sites reported seeing the crescent by naked eyes, such As Tarik and Mohammad Katbeh from Madaba, and Khaled Tell from Swealeh.

  • Algeria: ICOP member, Mr. Bankih Bankacem said: " The crescent was observed during six minutes between clouds."

  • Morocco: ICOP member, Dr. Hamid TOUMA said: "During the official News-TV on Friday 22 June 2001, The Moroccan Gouvernement has annonced that the Crescent of the Moon was seen within the Morocco aera so the first day of Rabe'a Thani is : Saturday 23 June 2001 in Morocco. It is a good decision which is in concordance with the astronomy observation.As you know that the New Moon was on 21 June 2001 at 11h 58 mn (UT)and it was a total eclipse of the sun in the South of Africa (Angola, Zambia, Mozambic, and after the Sunset on the same day (22 June 2001) it was impossible to observe the Crescent because it has only 7 hours 30 minutes, but on the day after (23 June 2001 the Crescent has 31 hours of life so it was logicaly visible in the region where it was not clouds in the sky."

  • Kenya: ICOP member, Mr. Mahmood Essa said: "I regret to let you know that owing to cloudy weather, I was not able to observe the crescent last Friday evening. However, Saturday 23/4/01 was the first day of Rabee' Thani in Kenya."

  • Nigeria:

    1. ICOP member, Dr. Sani Mustapha mentioned that he saw the crescent by naked eyes.

    2. ICOP member, Mr. Aminu Lukuman said: "The crescent did not appear on friday(22/06/2001) in Lagos Nigeria due to the thick cloud. I saw it on saturday (23/06/2001). Meanwhile, friday(22/06/2001) after magrib, is chosen to be the begining of the first day of 'Rabiu Thanni' in Nigeria."

    3. ICOP member, Mr. Usman Dukku said: "I saw the crescent at local sunset, between two large clouds,with five other observers but it disappeared behind the clouds after about twenty minutes."

      ICOP member, Mr. Isiaq Alabi said: "Tried to see the crescent on 22 June but due to clouds it was not possible. Whereas the Crescent was visible a few minutes even before the sunset on 23 June. First day of Rabeeul Aakhir began on 23 June 2001 according to official calendar."

  • Bosnia and Herzegovi: ICOP member, Mr. Kemal Sehbajraktarevic mentioned that he saw the crescent by naked eyes. He said: " Officially, first day of Rebiul ahir in Bosnia start yesterday at sunset, but according to the mooncalculator it should be at sunset this day (22.06.)."

  • Germany:

    1. ICOP member, Mr. Gerhard Ahmad Kaufmann mentioned that he saw the crescent by naked eyes.

  • USA:

    1. ICOP member, Mr. Gulamabbas Khakoo said: "This evening of Friday June 22nd, sighted the crescent for the month of RABII-ul-THANI in Buena Park, California. Local time approx. 20:25hrs. Sighting was very easy and clear. May Allah S.W.T accept our prayers and guide us on the right path. With Salaams and Dua's".

    2. ICOP member, Dr. Muhammad Hafiz said: "I LOOKED FOR THE CRESCENT IN DADE COUNTY, OPA LOCKA, FLORIDA ON 22TH, JUNE 2001, AT SUNSET. THE HORIZON WAS OBSTRUCTED BY RAIN CLOUDS, ACCOMPINED BY THUNDER STORM AT SUNSET, MAKING CRESCENT OBSERVATION IMPOSSIBLE. I REMEMBER READING FROM ISNA'S DECISION TO STICK TO LOCAL SIGHTING FOR ALL 12 MONTHS IN NORTH AMERICA, THAT IT WAS STATED THAT, IN A RESEARCH CARRIED OUT BY US NAVAL OBSERVATORY, 15% OR 15 PEOPLE OUT OF 100; WILL CLAIM TO HAVE SEEN THE CRESCENT ON A NIGHT WHEN IT WAS NOT POSSIBLE TO BE SEEN. TELLING THIS FACT TO MUSLIMS IN FLORIDA WHO FOLLOW SAUDI ARABIA; THEY QUESTION IF THE INVESTIGATORS OF THE RESEARCH WERE MUSLIMS. SINCE ALL OF YOU VARIFY CRESCENT SIGHTING IN NORTH AMERICA AND YOU HAVE THE NUMBERS AND DATA, MAYBE YOU CAN BACK TRACK AND CALCULATE, WHAT PERCENT OF THE MUSLIMS MAKE AN ERROR IN RESPECT TO THE CRESCENT; SO WE CAN HAVE SOME NUMBERS COMMING FROM MUSLIM RESEARCHERS AND ASTRONOMERS. HAVING THESE NUMBERS, AND PUBLISHING IT IN THE FORM OF AN ARTICLE WILL HELP MUSLIM TO SEE THE MAGNITUDE OF THE PROBLEM AND WOULD STIMULATE THEM TO ALWAYS VARIFY SIGHTING WITH ASTRONOMICAL INFORMATION. CAN YOU PLEASE LET ME KNOW IN WHAT WAY I CAN HELP TO BRING ABOUT, THIS ARTICLE. MAY BE YOU CAN SUPPLY ME WITH THE NUMBERS OF ERROR, # OF CORRECT SIGHTING AND TOTAL CLAIMS OF SIGHTING FOR EACH MONTH IN QUESTION AND EACH YEAR BACK, SO I CAN WRITE THE ARTICLE."

The OFFICIAL First Day in Different Countries

Friday 22 June:-

  1. Saudi
  2. Jordan
  3. Nigeria
  4. Bosnia and Herzegovi

Saturday 23 June:-

  1. Malaysia
  2. Iran
  3. Brunei
  4. Algeria
  5. Morocco
  6. Kenya
  7. Nigeria

The Accuracy of The Astronomical Calculations

To know about the accuracy of the astronomical calculations, then please click here


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